/* =============================================================================
   Vision Pilot - documentation site
   Dark-first, brand palette lifted from the Vision Pilot mark:
   teal (#3fbfbf) => periwinkle (#7f95e6) => violet (#a02fe0) on near-black.
   ============================================================================= */

:root {
  --bg: #06070a;
  --bg-elev: #0c0e14;
  --surface: #101320;
  --surface-2: #151929;
  --border: #21263a;
  --border-soft: #191d2d;

  --text: #e9ecf5;
  --text-dim: #a3abc2;
  --text-faint: #6d7590;

  --teal: #3fbfbf;
  --peri: #7f95e6;
  --violet: #a02fe0;
  --accent: #7f95e6;

  --grad: linear-gradient(110deg, #3fbfbf 0%, #7f95e6 48%, #a02fe0 100%);
  --grad-soft: linear-gradient(110deg, rgba(63, 191, 191, .16), rgba(160, 47, 224, .16));

  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1180px;

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, video, iframe { max-width: 100%; }
img { height: auto; }

a { color: var(--peri); text-decoration: none; }
a:hover { color: var(--teal); }

h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -0.02em; font-weight: 650; margin: 0 0 .5em; }

code, pre, kbd { font-family: var(--mono); }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* == Top bar ================================================================ */

.topbar {
  position: sticky; top: 0; z-index: 60;
  background: rgba(6, 7, 10, .78);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.topbar-inner {
  display: flex; align-items: center; gap: 26px;
  height: 62px;
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; color: var(--text); letter-spacing: -.02em; }
.brand:hover { color: var(--text); }
.brand-mark { width: 22px; height: 22px; border-radius: 7px; background: var(--grad); flex: none; }
.brand-ver {
  font: 600 11px/1 var(--mono); color: var(--teal);
  border: 1px solid rgba(63,191,191,.35); border-radius: 20px; padding: 4px 8px;
  background: rgba(63,191,191,.08);
}
.topnav { display: flex; align-items: center; gap: 22px; margin-left: auto; font-size: 14.5px; }
.topnav a { color: var(--text-dim); }
.topnav a:hover, .topnav a.active { color: var(--text); }
.topnav .ghost {
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 13px; color: var(--text);
}
.topnav .ghost:hover { border-color: var(--peri); background: rgba(127,149,230,.09); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 6px 10px; font-size: 14px; cursor: pointer; }

@media (max-width: 860px) {
  .topnav { display: none; }
  .topnav.open {
    display: flex; flex-direction: column; align-items: flex-start; gap: 14px;
    position: absolute; top: 62px; left: 0; right: 0; margin: 0;
    background: var(--bg-elev); border-bottom: 1px solid var(--border); padding: 18px 24px 24px;
  }
  .nav-toggle { display: block; }
}

/* == Hero =================================================================== */

.hero { position: relative; padding: 84px 0 56px; text-align: center; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -220px 0 auto; height: 640px; pointer-events: none;
  background:
    radial-gradient(58% 52% at 22% 34%, rgba(63,191,191,.20), transparent 68%),
    radial-gradient(58% 52% at 78% 30%, rgba(160,47,224,.22), transparent 68%);
  filter: blur(12px);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(127,149,230,.055) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(127,149,230,.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(72% 62% at 50% 26%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(72% 62% at 50% 26%, #000 0%, transparent 78%);
}
.hero > * { position: relative; z-index: 1; }

.hero-logo { width: min(420px, 78%); margin: -18px auto 4px; display: block; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font: 500 13px/1 var(--sans); letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border); background: var(--surface);
  border-radius: 30px; padding: 7px 15px; margin-bottom: 22px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 10px var(--teal); }

.hero h1 { font-size: clamp(32px, 5.4vw, 60px); font-weight: 700; margin-bottom: 18px; }
.hero .lede {
  font-size: clamp(16.5px, 1.7vw, 20px); color: var(--text-dim);
  max-width: 780px; margin: 0 auto 30px;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 26px; }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--grad); color: #07070c; box-shadow: 0 8px 26px rgba(127,149,230,.28); }
.btn-primary:hover { color: #07070c; box-shadow: 0 12px 34px rgba(127,149,230,.4); }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--peri); color: var(--text); }

.badge-row { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.badge-row img { height: 20px; }

/* == Sections =============================================================== */

.section { padding: 76px 0; }
.section + .section { border-top: 1px solid var(--border-soft); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 44px; }
.section-head h2 { font-size: clamp(25px, 3.2vw, 36px); }
.section-head p { color: var(--text-dim); margin: 0; font-size: 17px; }
.section-kicker {
  display: block; font: 600 12.5px/1 var(--mono); letter-spacing: .13em; text-transform: uppercase;
  color: var(--teal); margin-bottom: 14px;
}

/* == Cards & grids ========================================================== */

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 960px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); } }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; transition: border-color .18s ease, transform .18s ease, background .18s ease;
}
.card:hover { border-color: #2e3550; transform: translateY(-2px); }
.card h3 { font-size: 17.5px; margin-bottom: 8px; }
.card p { margin: 0; color: var(--text-dim); font-size: 15px; }
a.card { display: block; color: inherit; }
a.card:hover { color: inherit; }
.card-tag {
  font: 600 11px/1 var(--mono); letter-spacing: .09em; text-transform: uppercase;
  color: var(--teal); display: block; margin-bottom: 12px;
}
.card-icon {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid var(--border); margin-bottom: 14px;
  font-size: 18px;
}

/* feature pills (ACC / AEB / LKAS …) */
.feat {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px;
}
.feat .abbr {
  font: 700 13px/1 var(--mono); letter-spacing: .04em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  flex: none; padding-top: 3px; min-width: 62px;
}
.feat .txt { font-size: 14.5px; color: var(--text-dim); }
.feat .txt b { display: block; color: var(--text); font-weight: 600; font-size: 15px; margin-bottom: 2px; }

/* stat strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border-soft);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.stats div { background: var(--bg-elev); padding: 22px 20px; text-align: center; }
.stats .n { font-size: 26px; font-weight: 700; letter-spacing: -.03em; display: block; }
.stats .l { font-size: 13px; color: var(--text-faint); text-transform: uppercase; letter-spacing: .07em; }
@media (max-width: 720px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* == Media ================================================================== */

.media {
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  background: var(--bg-elev);
}
.media img { display: block; width: 100%; }
.media figcaption {
  padding: 12px 18px; font-size: 13.5px; color: var(--text-faint);
  border-top: 1px solid var(--border-soft);
}

/* click-to-load video embed - keeps the page light until the user asks for it */
.vframe {
  position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); background: #000; cursor: pointer; display: block; width: 100%;
  padding: 0;
}
.vframe img { width: 100%; height: 100%; object-fit: cover; display: block; opacity: .82; transition: opacity .2s, transform .4s; }
.vframe:hover img { opacity: 1; transform: scale(1.015); }
.vframe iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.vframe .play {
  position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none;
}
.vframe .play span {
  width: 72px; height: 72px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(8,9,14,.66); border: 1px solid rgba(233,236,245,.5);
  backdrop-filter: blur(6px); transition: transform .2s;
}
.vframe:hover .play span { transform: scale(1.08); }
.vframe .play span::before {
  content: ""; border-left: 17px solid var(--text); border-top: 10px solid transparent;
  border-bottom: 10px solid transparent; margin-left: 5px;
}
.vframe .label {
  position: absolute; left: 14px; bottom: 12px; font-size: 13px; color: var(--text);
  background: rgba(8,9,14,.7); border: 1px solid var(--border); border-radius: 7px; padding: 5px 11px;
  pointer-events: none;
}

/* == Tabs (quick start) ===================================================== */

.tabs { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-elev); }
.tablist { display: flex; gap: 0; border-bottom: 1px solid var(--border); background: var(--surface); flex-wrap: wrap; }
.tablist button {
  appearance: none; background: none; border: 0; border-bottom: 2px solid transparent;
  color: var(--text-dim); font: 600 14.5px/1 var(--sans); padding: 15px 20px; cursor: pointer;
}
.tablist button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--teal); background: var(--bg-elev); }
.tabpanel { padding: 8px 24px 22px; }
.tabpanel[hidden] { display: none; }

/* == Code =================================================================== */

pre {
  background: #0a0c14; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px 18px; overflow-x: auto; font-size: 13.6px; line-height: 1.6; margin: 16px 0;
}
pre code { background: none; padding: 0; border: 0; font-size: inherit; color: #d6dcf0; }
:not(pre) > code {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px;
  padding: .14em .42em; font-size: .875em; color: #c8d2f0;
  white-space: nowrap;  /* keep flags like -DENABLE_OCCUPANCY=ON in one piece */
}
.highlight { margin: 16px 0; }
.highlight pre { margin: 0; }

.copy-btn {
  position: absolute; top: 8px; right: 8px; opacity: 0;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 6px; padding: 4px 9px; font: 500 11.5px/1.4 var(--sans); cursor: pointer;
  transition: opacity .15s ease, color .15s ease, border-color .15s ease;
}
pre:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--text); border-color: var(--peri); }

/* rouge - monokai-ish tuned for this palette */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs { color: #5f6885; font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kr, .highlight .kt { color: #c792ea; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sx { color: #8fd6a0; }
.highlight .nb, .highlight .nf, .highlight .nc { color: #7fd6e6; }
.highlight .m, .highlight .mi, .highlight .mf { color: #f2b179; }
.highlight .nv, .highlight .vg { color: #e9ecf5; }
.highlight .o, .highlight .p { color: #a3abc2; }
.highlight .gp { color: #6d7590; }

/* == Timeline (releases) ==================================================== */

.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(180deg, var(--teal), var(--violet), transparent);
}
.tl-item { position: relative; padding-bottom: 30px; }
.tl-item::before {
  content: ""; position: absolute; left: -25px; top: 8px; width: 12px; height: 12px;
  border-radius: 50%; background: var(--bg); border: 2px solid var(--peri);
}
.tl-item.current::before { background: var(--teal); border-color: var(--teal); box-shadow: 0 0 0 4px rgba(63,191,191,.16); }
.tl-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 6px; }
.tl-head .v { font: 700 17px/1.3 var(--mono); }
.tl-head .d { font-size: 13px; color: var(--text-faint); }
.pill {
  font: 600 11px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase;
  border-radius: 20px; padding: 4px 9px; border: 1px solid var(--border); color: var(--text-dim);
}
.pill.latest { color: #07070c; background: var(--grad); border-color: transparent; }
.tl-item ul { margin: 6px 0 0; padding-left: 20px; color: var(--text-dim); font-size: 15px; }
.tl-item li { margin: 3px 0; }

/* == Callouts =============================================================== */

.note {
  border: 1px solid var(--border); border-left: 3px solid var(--peri);
  background: var(--surface); border-radius: var(--radius-sm);
  padding: 14px 18px; margin: 20px 0; font-size: 15px; color: var(--text-dim);
}
.note strong { color: var(--text); }
.note.warn { border-left-color: #e0a02f; }
.note.tip { border-left-color: var(--teal); }

/* == Docs layout ============================================================ */

.docs { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 52px;
  max-width: var(--maxw); margin: 0 auto; padding: 44px 24px 90px; }
/* On narrow screens the article comes first and the nav moves below it,
   so readers are not made to scroll past a full table of contents. */
@media (max-width: 900px) {
  .docs { display: flex; flex-direction: column; gap: 34px; padding-top: 28px; }
  .sidebar { order: 2; }
}

.sidebar { position: sticky; top: 86px; align-self: start; max-height: calc(100vh - 110px); overflow-y: auto; font-size: 14.5px; }
@media (max-width: 900px) {
  .sidebar { position: static; max-height: none; border: 1px solid var(--border);
    border-radius: var(--radius); padding: 18px 18px 4px; background: var(--surface); }
  .sidebar .grp { margin-bottom: 16px; }
}
.sidebar .grp { margin-bottom: 22px; }
.sidebar .grp-t {
  font: 600 11.5px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-faint); margin-bottom: 10px;
}
.sidebar a {
  display: block; padding: 6px 12px; margin-left: -12px; border-radius: 7px;
  color: var(--text-dim); border-left: 2px solid transparent;
}
.sidebar a:hover { color: var(--text); background: var(--surface); }
.sidebar a.active { color: var(--text); font-weight: 600; border-left-color: var(--teal); background: var(--surface); }

.doc-body { min-width: 0; }
.doc-body h1 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 10px; }
.doc-body .doc-lede { font-size: 18px; color: var(--text-dim); margin: 0 0 34px; }
.doc-body h2 {
  font-size: 25px; margin: 46px 0 14px; padding-top: 14px; border-top: 1px solid var(--border-soft);
}
.doc-body h3 { font-size: 19px; margin: 30px 0 10px; }
.doc-body h4 { font-size: 16px; margin: 22px 0 8px; color: var(--text-dim); }
.doc-body p, .doc-body li { color: #ccd2e4; }
.doc-body ul, .doc-body ol { padding-left: 22px; }
.doc-body li { margin: 5px 0; }
.doc-body img { border-radius: var(--radius-sm); border: 1px solid var(--border); }
.doc-body hr { border: 0; border-top: 1px solid var(--border-soft); margin: 40px 0; }
.doc-body blockquote {
  margin: 20px 0; padding: 2px 18px; border-left: 3px solid var(--border); color: var(--text-dim);
}

table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14.8px; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
th { color: var(--text); font-weight: 600; background: var(--surface); border-bottom-color: var(--border); white-space: nowrap; }
td code { white-space: nowrap; }

.doc-foot {
  margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--border-soft);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 14px; color: var(--text-faint);
}

/* == Footer ================================================================= */

.footer { border-top: 1px solid var(--border-soft); background: var(--bg-elev); padding: 52px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 34px; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
.footer h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .1em; color: var(--text-faint); margin-bottom: 12px; }
.footer ul { list-style: none; margin: 0; padding: 0; font-size: 14.5px; }
.footer li { margin: 7px 0; }
.footer a { color: var(--text-dim); }
.footer a:hover { color: var(--teal); }
.footer .blurb { color: var(--text-faint); font-size: 14.5px; max-width: 340px; }
.footer-bottom {
  margin-top: 38px; padding-top: 20px; border-top: 1px solid var(--border-soft);
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  font-size: 13.5px; color: var(--text-faint);
}

/* == Motion ================================================================= */

/* Scoped to .js so content is never hidden when scripting is unavailable -
   the class is set by the inline snippet in _layouts/base.html. */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* screen-reader only */
.sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 4px; }